EP3325605B1 - Biomasse de thraustochytrides riche en proteines, procede de culture et utilisations - Google Patents
Biomasse de thraustochytrides riche en proteines, procede de culture et utilisations Download PDFInfo
- Publication number
- EP3325605B1 EP3325605B1 EP16750384.6A EP16750384A EP3325605B1 EP 3325605 B1 EP3325605 B1 EP 3325605B1 EP 16750384 A EP16750384 A EP 16750384A EP 3325605 B1 EP3325605 B1 EP 3325605B1
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- EP
- European Patent Office
- Prior art keywords
- biomass
- ccap
- microalgae
- schizochytrium
- culture
- Prior art date
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- A23L17/00—Food-from-the-sea products; Fish products; Fish meal; Fish-egg substitutes; Preparation or treatment thereof
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- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
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- A23L33/135—Bacteria or derivatives thereof, e.g. probiotics
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- A—HUMAN NECESSITIES
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- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/17—Amino acids, peptides or proteins
- A23L33/195—Proteins from microorganisms
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- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
- A61K8/97—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from algae, fungi, lichens or plants; from derivatives thereof
- A61K8/9728—Fungi, e.g. yeasts
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
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- A—HUMAN NECESSITIES
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- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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- A23V2250/00—Food ingredients
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- A61K2800/10—General cosmetic use
Definitions
- the invention falls within the field of cultures of microalgae, particularly Thraustochytrids. It relates to a biomass of Thraustochytrids rich in proteins, its process for obtaining it and its uses in food.
- soybeans The best known source of vegetable protein used in animal feed is soybeans, generally used in the form of meal, the solid residue remaining after oil extraction.
- soybean cakes has several disadvantages associated with their origin. Cakes are generally imported from countries that practice intensive soybean cultivation to the detriment of other plants that are a source of biodiversity.
- GMO genetically modified
- Animal feeds based on biomass consisting of genetically modified photosynthetic microorganisms are known from WO 2010/051489 .
- the recombinant enzyme produced by the GMO microorganism has the effect of degrading said biomass to make it compatible with animal feed.
- Spirulina like chlorella, however, has the disadvantage of low productivity which does not allow the transition to culture in a high yield fermenter. If their culture makes it possible to meet a local and limited demand for traditional food supplements, it does not make it possible to meet a broader objective of industrial production, economically viable, of a source of food proteins whose qualities will allow it to replace the common sources such as soy in animal and human food.
- protists known to respond to an industrial production capacity in fermenters have long been used for the production of fats rich in polyunsaturated fatty acids such as DHA or EPA, for example.
- WO 97/37032 WO 2015/004402 Or WO 2012/175027 .
- the biomasses obtained, including after extraction of the fats do not contain sufficient levels of protein to allow their use as a source of protein in food, at least without additional stages of enrichment with economically costly proteins.
- the methods used for the extraction of oils can sometimes contaminate the remaining biomass, in particular with organic solvents which make it unsuitable for food consumption.
- One of the aims of the invention is to provide a new protein source for animal or human food meeting a broad industrial production objective, economically viable, and whose qualities will enable it to replace the usual sources such as soy.
- the invention shows that under certain culture conditions the Thraustochytrids, known for their use in the production of oils with high levels of polyunsaturated fatty acids (DHA, EPA in particular) are microorganisms capable of producing a large quantity of proteins, which can make it a source of dietary protein similar to soy, especially for animal feed.
- DHA polyunsaturated fatty acids
- the invention has as its primary object a biomass of non-genetically modified Thraustochytrids chosen from the genera Aurantiochytrium and Schyzochytrium, of which a majority substantial quantity of Thraustochytrids is not degraded, which comprises, by weight relative to the weight of the dry matter, at least 35% protein, preferably at least 45% protein, possibly up to more than 60% protein, or even more than 75% protein, in particular from 45 to 75% protein.
- the percentages by weight of proteins can be expressed both in relation to the proteins themselves and in relation to the amino acids contained in said proteins.
- Said biomass also comprises, by weight relative to the weight of dry matter, less than 20% fat, preferably less than 10% fat, even more preferably less than 7% fat.
- said biomass is a biomass of non-genetically modified Thraustochytrids chosen from the genera Aurantiochytrium and Schyzochytrium, of which a majority substantial quantity of Thraustochytrids is not degraded, which comprises, by weight relative to the weight of the dry matter, at less than 35%, preferably at least 45%, very preferably from 45% to 60% of proteins and, still by weight relative to the weight of the dry matter, less than 20%, preferably less than 10% of fat, even more preferably less than 7% fat.
- the invention also relates to the use of a biomass as above or below, in the cosmetics and human or animal food fields, and in particular a food comprising such a biomass.
- the invention also relates to the biomass according to the invention for its use in therapy.
- compositions for humans or animals and food, or food compositions for humans or animals, which comprise a biomass according to the invention.
- biomass advantageously means according to the invention a set of Thraustochytrid cells produced by the culture of said protists, and having the protein and, optionally, fatty acid contents described in the present text, cells which may or may not have retained their physical integrity.
- said biomass may comprise a quantity of degraded Thraustochytrid cells ranging from 0% to 100%.
- degraded is meant that said Thraustochytrid cells may have seen their structure and/or their composition modified. For example, they may have undergone a drying step or else a step for harvesting their oil, the important thing being that the biomass comprising these cells has the protein and, optionally, fatty acid contents described in the present text.
- the biomass has not undergone treatments which modify its amino acid composition during or after harvest. That is to say that the treatments that this biomass undergoes after harvesting do not alter its amino acid composition.
- the biomass does not undergo a step of enrichment in proteins and/or in amino acids. That is to say, the proteins, peptides and amino acids contained in the biomass according to the invention come from the sole culture of Thraustochytrids. It should be noted that proteins or amino acids not produced by Thraustochytides are likely to be present in the culture medium, in particular in the case of preculture on a medium comprising a yeast extract. The residual quantities of these proteins likely to be present in the biomass, if any, will be in the state of undetectable traces, included in the definition of a biomass which does not undergo protein enrichment and/or in amino acids.
- the biomass has not undergone treatments which modify its composition in terms of amino acids and fat. That is to say that the treatments that this biomass undergoes after harvesting do not alter its composition in amino acids and fats.
- the relative composition of amino acids with respect to fat remains substantially constant.
- Thraustochytrids in the biomass according to the invention have better preservation and digestibility properties than degraded Thraustochytrids.
- One of the preferred forms of the invention is a biomass comprising a substantially majority amount of Thraustochytrids which are not degraded.
- Thraustochytrids whose structural and/or chemical integrity may have been altered, such as for example lysed Thraustochytrids, resulting for example from a homogenization process.
- said biomass may have, by weight relative to the weight of the dry matter, a moisture content of 1% to 95%.
- said biomass may have, by weight relative to the weight of the dry matter, a moisture content of 70 to 90%, preferably 80 to 85%.
- said biomass may have, by weight relative to the weight of the dry matter, a moisture content of 1 to 10%, preferably of 2 to 7%.
- said Thraustochytrids may be of the order Thraustochytriales, preferentially of the subclass Thraustochytriaceae, even more preferentially of a genus which can be chosen from the group comprising the genera Aurantiochytrium, Aplanochytrium, Botryochytrium, Japonochytrium, Oblongichytrium, Parietichytrium, Schizochytrium, Sicyoidochytrium, Thraustochytrium and Ulkenia.
- Thraustochytrids are very preferentially non-genetically modified microorganisms.
- said Thraustochytrids can be chosen from the Aplanochytrium kerguelense species; Aplanochytrium minuta; Aplanochytrium stocchinoi; Aplanochytrium sp. PR24-1 ; Aurantiochytrium limacinum; Aurantiochytrium limacinum AB022107; Aurantiochytrium limacinum HM042909; Aurantiochytrium limacinum JN986842 ; Aurantiochytrium limacinum SL1101 JN986842; Aurantiochytrium mangrovei; Aurantiochytrium mangrovei DQ323157; Aurantiochytrium mangrovei DQ356659; Aurantiochytrium mangrovei DQ367049; Aurantiochytrium mangrovei CCAP 4062/2; Aurantiochytrium mangrovei CCAP 4062/3; Aurantiochytrium mangrovei CCAP 4062/4
- Botryochytrium radiatum Botryochytrium radiatum Raghukumar 16; Botryochytrium radiatum SEK353; Botryochytrium sp. ; Botryochytrium sp. BUTRBC 143; Botryochytrium sp. Raghukumar 29; Oblongichytrium minutum; Oblongichytrium multirudimentalis; Oblongichytrium sp. ; Oblongichytrium sp.
- Parieticytrium sarkarianum Parieticytrium sarkarianum SEK351; Parieticytrium sarkarianum SEK364; Parieticytrium sp. ; Parieticytrium sp. F3-1; Parieticytrium sp. H1-14; Parieticytrium sp.
- NBRC102984 Phytophthora infestans ; Schizochytrium aggregatum DQ323159; Schizochytrium aggregatum DQ356661; Schizochytrium aggregatum; Schizochytrium limacinum; Schizochytrium limacinum OUC166 HM042907; Schizochytrium mangrovei; Schizochytrium mangrovei FB1; Schizochytrium mangrovei FB3; Schizochytrium mangrovei FB5; Schizochytrium minutum; Schizochytrium sp. ATCC20888 DQ367050; Schizochytrium sp. KGS2 KC297137; Schizochytrium sp.
- SEK 210 Schizochytrium sp. SEK 345; Schizochytrium sp. SEK 346; Schizochytrium sp. SR21; Schizochytrium sp. TIO01; Sicyoidochytrium minutum SEK354; Sicyoidochytrium minutum NBRC 102975 Sicyoidochytrium minutum NBRC 102979; Thraustochytriidae sp. BURABG162 DQ100295; Thraustochytriidae sp. CG9; Thraustochytriidae sp. LY2012 JX847378; Thraustochytriidae sp.
- Thraustochytrium aggregatum Thraustochytrium aggregatum DQ356662; Thraustochytrium aureum; Thraustochytrium aureum DQ356666; Thraustochytrium gaertnerium; Thraustochytrium kinnei; Thraustochytrium kinnei DQ323165; Thraustochytrium motivum; Thraustochytrium multirudimentale; Thraustochytrium pachydermum; Thraustochytrium roseum ; Thraustochytrium sp. 13A4.1; Thraustochytrium sp. ATCC 26185; Thraustochytrium sp.
- Thraustochytrium sp. BL14 Thraustochytrium sp. BL2; Thraustochytrium sp. BL3; Thraustochytrium sp. BL4; Thraustochytrium sp. BL5; Thraustochytrium sp. BL6; Thraustochytrium sp. BL7; Thraustochytrium sp. BL8; Thraustochytrium sp. BL9; Thraustochytrium sp. BP3.2.2; Thraustochytrium sp. BP3.3.3; Thraustochytrium sp.
- CCAP CULTURE COLLECTION OF ALGAE AND PROTOZOA
- step a) of culturing the Thraustochytrids is carried out in a culture medium and under appropriate conditions to promote the production of proteins and to limit the production of fat.
- said suitable culture medium is preferably a chemically defined culture medium which comprises a carbon source, a nitrogen source, a phosphorus source and salts.
- “chemically defined culture medium” is meant according to the invention a culture medium in which the content of each element is known. Specifically, the invention is aimed at a medium that may not contain rich or complex organic matter.
- rich or complex organic materials we mean unpurified organic materials, in the form of mixtures for which the exact composition and the concentrations of the various components of the mixture are not known with accuracy, not mastered, and can present a significant variability. from one batch to another.
- rich or complex organic material mention may be made of yeast extracts or peptones which are products of a protein hydrolysis reaction or else rich mineral materials such as, for example, marine mineral salts or other growth agents. complex, not having a fixed concentration of each of their components.
- said defined medium may comprise salts chosen from calcium, cobalt, manganese, magnesium, zinc, nickel, copper, potassium, iron, sodium salts, and mixtures thereof.
- said salts can be chosen from calcium chloride, cobalt chloride, manganese chloride, magnesium sulphate, zinc sulphate, nickel sulphate, copper sulphate, potassium sulphate, ferrous sulphate , potassium sulfate, sodium molybdate, sodium selenite, sodium chloride and mixtures thereof.
- the medium may also comprise sodium chloride (NaCl), in particular for certain strains of marine origin.
- NaCl sodium chloride
- the medium may not include sodium chloride (NaCl), at the very least include a very small quantity of sodium chloride, having less than 3.5 g/ L, preferably less than 1 g/L, more preferably less than 10 mg/L of sodium ions and less than 1 g/L, preferably less than 500 mg/L, more preferably 200 mg/L of ions of chloride.
- NaCl sodium chloride
- strains which can accept a culture medium which may not comprise sodium chloride (NaCl), at the very least comprising a very small quantity of sodium chloride the strains of Aurantiochytrium mangrovei, in particular the Aurantiochytrium mangrovei strain CCAP 4062/5.
- the carbon source of said defined medium may be one (or more) carbohydrate(s), one (or more) acetate(s), one or more alcohols, one or more complex molecules, or any mixture, in any proportion from at least 2 of these sources.
- said nitrogen source of said defined medium may be chosen from one (or more) salt(s) of nitrate, one (or more) salt(s) of glutamate, one (or more) salt(s) ) ammonium, urea, ammonia or any mixture, in any proportion of at least 2 of these sources.
- the source of phosphorus of said defined medium may be chosen from phosphoric acid, phosphate salts, advantageously sodium hydrogen phosphate (Na 2 HPO 4 ), or sodium dihydrogen phosphate (NaH 2 PO 4 ), or potassium dihydrogen phosphate (KH 2 PO 4 ), or potassium hydrogen phosphate (K 2 HPO 4 ), or any mixture, in any proportion of at least 2 of these sources.
- said culture medium may comprise magnesium chloride, advantageously in the form of tetrahydrate (MgCl 2 4H 2 O); calcium chloride, advantageously in the dihydrate form (CaCl 2 2H 2 O); cobalt chloride hexahydrate (CoCl 2 6H 2 O); manganese(II) chloride tetrahydrate (MnCl 2 4H 2 O); magnesium sulphate heptahydrate (MgSO4, 7H2O); zinc sulphate heptahydrate (ZnSO4, 7H2O); nickel sulphate hexahydrate (NiSO 4 6H 2 O); copper sulphate pentahydrate (CuSO 4 5H 2 O); potassium sulphate (K 2 SO 4 ); ferrous sulphate heptahydrate (FeSO 4 .7H 2 O); boric acid (H 3 BO 3 ); ethylenediaminetetraacetic acid in disodium dihydrate form (Na 2 EDTA
- the magnesium chloride in said culture medium, may be at a concentration of between 0.008 and 0.012 g/L, advantageously between 0.009 and 0.011 g/L;
- the calcium chloride can be at a concentration of between 0.40 and 0.70 g/L, advantageously between 0.50 and 0.60 g/L;
- the cobalt chloride hexahydrate can be at a concentration of between 0.00008 and 0.00013 g/L, advantageously between 0.00009 and 0.00012 g/L;
- the manganese(II) chloride tetrahydrate can be at a concentration of between 0.008 and 0.013, advantageously between 0.009 and 0.012 g/L;
- the magnesium sulphate heptahydrate can be at a concentration of between 6 and 10 g/L, advantageously between 7 and 9 g/L;
- the zinc sulphate heptahydrate can be at a concentration of between 0.008 and 0.013, advantageously 0.009 and 0.0
- the magnesium chloride is at a concentration of 0.0108 g/L
- the calcium chloride is at a concentration of 0.55 g/L
- cobalt chloride hexahydrate (CoCl 2 6H 2 O) is at a concentration of 0.000108 g/L
- the manganese(II) chloride tetrahydrate is at a concentration of 0.0108 g/L
- magnesium sulphate heptahydrate is at a concentration of 8.01 g/L
- zinc sulphate heptahydrate is at a concentration of 0.0108 g/L
- nickel sulphate hexahydrate is at a concentration of 0.0056 g/L
- copper sulphate pentahydrate is at a concentration of 0.0072 g/L
- the potassium sulphate is at a concentration of 2.09 g/L
- the ferrous sulphate heptahydrate is at a concentration of 0.04 g/L
- boric acid is at a concentration
- the first culture step a) of the process can be carried out in discontinuous mode called “batch”, in semi-continuous mode called “fed batch” or in continuous mode.
- the first step is divided into 2 sub-steps, a first sub-step a1) of growth in the appropriate culture medium followed by a second sub-step a2) of production in which can be added to the culture medium, simultaneously or successively, one or more solution(s) for enrichment in carbon source, nitrogen source and/or phosphorus source so as to maintain in the culture medium non-limiting nitrogen and phosphorus content for growth.
- the growth substep a1) is carried out until a concentration of carbon source, more particularly of glucose, is less than 20 g/L.
- the growth sub-step a1) is carried out until a culture density of at least 20 g/L, preferably at least 40 g/L, is obtained, more preferably at least 60 g/L, even more preferably at least 80 g/L
- the non-limiting nitrogen source content in step a2) is advantageously between 0.5 and 5 g/L, preferably between 0.5 and 2 g/L and the non-limiting phosphorus source content is advantageously between between 0.5 and 5 g/L, preferably 0.5 and 2 g/L.
- the desired carbon source content for this step a2) may be between 0 and 200 g/L, in particular between 5 or even 10 and 50 g/L.
- the carbon source content in sub-step a2) is between 0 and 50 g/L, more preferably between 0 and 10 g/L.
- the culture, the first stage a) of which is divided into two sub-stages a1) and a2) as defined above, is carried out in semi-continuous mode called “fed batch”.
- Thraustochytrids at densities of more than 20 g/L, and in particular of more than 80 g/L, are well known to those skilled in the art.
- the culture can be carried out by any known culture technique, for example in flasks or in a reactor, but also in fermenters or even in any container suitable for the growth of protists, particularly Thraustochytrids, such as for example basins of the "raceway" type, provided that said technique makes it possible to implement the required culture conditions.
- any known culture technique for example in flasks or in a reactor, but also in fermenters or even in any container suitable for the growth of protists, particularly Thraustochytrids, such as for example basins of the "raceway" type, provided that said technique makes it possible to implement the required culture conditions.
- the culture is carried out in fermenters according to known methods for culturing protists in fermenters.
- the second step b) of the process allowing the recovery of said biomass can be carried out under appropriate conditions to obtain a biomass which can have the desired moisture content.
- Said recovery of the protists can be carried out by any technique allowing the recovery of the biomass, in particular filtration methods, gravimetric or under reduced pressure, centrifugation, decantation, or even precipitation methods followed by gravimetric filtration.
- a subject of the invention is also a biomass capable of being obtained by the method according to the invention as described previously in all its variants.
- a further subject of the invention is the use of a biomass as described above in the cosmetic, pharmaceutical, human or animal food fields.
- livestock means in particular grazing animals (in particular cattle reared for meat, milk, cheese and leather; sheep reared for meat, wool and cheese; goats), pigs, rabbits, poultry (chickens, hens, turkeys, ducks, geese and others), equines (ponies, horses, foals), intended to support human activities (transport, leisure) or their food , aquatic animals (eg fish, shrimp, oysters and mussels).
- grazing animals in particular cattle reared for meat, milk, cheese and leather; sheep reared for meat, wool and cheese; goats
- pigs rabbits
- poultry chickens, hens, turkeys, ducks, geese and others
- equines ponies, horses, foals
- aquatic animals eg fish, shrimp, oysters and mussels
- a subject of the invention is also a food, or food composition, for humans or animals, which may comprise a biomass according to the invention as described above.
- the term “food” is understood to mean any composition which can be used as food for humans or animals, in particular farm animals.
- the food may only comprise biomass, dried or not, transformed or not, or biomass, dried or not, transformed or not, mixed with any other additive, vehicle or support, used in the field human or animal food, such as for example food preservatives, colorants, flavor enhancers, pH regulators, or even pharmaceutical additives such as for example growth hormones, antibiotics.
- the present invention relates in particular to feedstuffs for animals and more particularly for livestock.
- These foods are usually in the form of flours, granules or soups in which the biomass according to the invention is incorporated.
- food is meant anything that can be used as food for animals.
- feeds may include, in addition to algal biomass, a nutritional base and nutritional additives.
- the main part of the animal's food ration is then made up of the "nutritional base” and the algal biomass.
- This base consists, for example, of a mixture of cereals, proteins and fats of animal and/or vegetable origin.
- Nutritional bases for animals are suitable for feeding these animals and are well known to those skilled in the art.
- these nutritional bases include, for example, corn, wheat, peas and soya. These nutritional bases are adapted to the needs of the different animal species for which they are intended. These nutritional bases may already contain nutritional additives such as vitamins, mineral salts and amino acids.
- Additives used in animal feed can be added to improve certain characteristics of feed, for example to enhance its taste, to make the raw materials of animal feed more digestible or to protect animals. They are frequently used in large intensive farms.
- the invention relates to food for breeding animals comprising between 1 and 60%, preferably between 1 and 20%, quite preferably between 3 and 8% of a biomass dried or obtained by the process according to the invention.
- the invention relates to food for breeding animals comprising between 1 and 40%, preferably between 5 and 10% of an undried biomass obtained by the method of the invention.
- the food is intended for farm animals, in particular cattle, sheep, pigs, rabbits, poultry and equines.
- the food is intended for aquatic animals, in particular fish, at least up to the fry stage, or even including farmed fish.
- the food is intended for domestic animals, companion animals and/or recreational animals.
- the food composition is intended for humans.
- a subject of the invention is also a cosmetic or pharmaceutical composition for humans or animals comprising a biomass according to the invention as described previously.
- the cosmetic or pharmaceutical composition may comprise only biomass, dried or not, transformed or not, or biomass, dried or not, transformed or not, mixed with any other additive, vehicle or support, used in the field of cosmetics or pharmacy such as preservatives, dyes, pH regulators, for example.
- a preculture of Aurantiochytrium mangrovei is carried out on a shaking table (140 rpm) in a thermostatically controlled chamber (26°C), in preculture medium, containing 4 g of extract of yeast as a nitrogen source, and 30 g of glucose as a carbon source. After 48 hours of incubation, the cells are centrifuged for 5 minutes at 3000 g and the pellet of cells rinsed with preculture medium containing neither yeast extract nor any other source of mineral or organic nitrogen. The purpose of this operation is to avoid any contribution of Na + in the main culture via the addition of yeast extract.
- the preculture corresponds to 1/100 (v/v) of the culture volume of the main solution. In the case of the strain of Schizochytrium sp. CCAP 4062/3, 27 g/l of NaCl are added to this medium.
- the total biomass concentration is monitored by measuring the dry mass (filtration on a GF/F filter, Whatman, then drying in an oven, at 105° C., for a minimum of 24 h before weighing).
- Cultures of Aurantiochytrium mangrovei CCAP 4062/5 are carried out in useful 1 to 2 L fermenters (bioreactors) with dedicated automatons and supervision by computer station.
- composition of the culture medium as well as those corresponding to the addition solutions are as follows: Main Solution Concentration (g/L) KCl 0.36 H 3 BO 3 0.175 MgSO 4 .7H 2 0 6,750 CaCl2.2H20 _ 0.55 KNO 3 0.04667 KH2PO4.7H2O _ _ 0.30940 Na 2 EDTA, 2H 2 O 3,094.10 -3 ZnSO4.7H2O _ 7.3.10 -5 CoCl2.6H2O _ 1.6.10 -5 MnCl 2 .4H 2 O 5.4.10 -4 Na2MoO4.2H2O _ _ 1.48.10 -6 Na 2 SeO 3 1.73.10 -6 NiSO 4 .6H 2 O 2.98.10 -6 CuSO 4.5H 2 0 9.8.10 -6 EDTA-Fe 0.03 Carbon g/L Glucose 55 Nitrogen g/L (NH4 ) 2SO4 7 Addition after autoclave vitamins g/L Thiamine
- the system is regulated at pH 6 via the addition of base (NaOH, or KOH) and/or acid (sulphuric acid solution).
- the culture temperature was set at 26°C.
- the dissolved oxygen pressure was regulated in the medium throughout the culture, by the stirring speed (250 - 1200 rpm), the air flow (0.25 - 1 vvm), even the oxygen flow (0.1 - 0.5 vvm).
- the regulation parameters, integrated in the supervision PLC, made it possible to maintain a constant pO 2 of between 5% and 30%.
- the culture time was between 20 and 100 hours, preferably between 25 and 96 hours, for example 50 hours.
- addition solution 1 3 additions of addition solution 1 were made, as well as additions of solution 2 in order to maintain glucose concentrations between 200 mM and 500 mM.
- the modification of the procedure is done on the mode of pH regulation by addition of ammonia (NH 4 OH) to avoid the significant contribution of Na + or K + related to the pH regulation by soda or potash, and which could be embarrassing for the valorization of products for animal feed. Part of the nitrogen necessary for the culture of the cells being supplied via the regulation of the pH by ammonia (NH 4 OH).
- the physicochemical parameters are controlled during the culture thanks to integrated regulators, with maintenance of the pH around a set point of 5, regulation of the temperature at 30°C, and maintenance of the pO 2 around a set point of 30% until maximum agitation and airflow values are reached.
- the modification of the procedure relates to the mediums and their mode of addition.
- the continuous culture mode is then started as soon as the biomass reaches 20 g/L in the medium.
- the feed solution supplied continuously is that described in Table 4 below.
- Table 4 Compound feed solution (g/L) Glucose, 1H 2 O 110,000 sea salts 15,000 MgSO 4.7H 2 O 4,959 K2SO4 _ 6,129 KH 2 PO 4 11,786 MnCl24H2O _ 3,182.10 -2 ZnSO 4 .7H 2 O 3,182.10 -2 CoCl2.6H2O _ 3.2.10 -4 Na2MoO4.2H2O _ _ 3,200.10 -4 CuSO4.5H2O _ 2,121.10 -2 NiSO4.6H2O _ 1,650.10 -2 FeSO 4 .7H 2 O 1,179.10 -1 thiamin 9,429.10 -2 Vitamin B12 1,530.10 -3 Panthotenate 3,182.10 -2 ( NH4 ) 2SO4 26,518 EDTA 4,092.10 -1
- the dilution rate used directly impacts the protein content of the biomass (results not shown).
- the dilution rate used is 0.13 h ⁇ 1 which corresponds to half the maximum growth rate of the strain under the culture conditions used.
- Cultures of Schizochytrium sp. CCAP 4062/3 are carried out in fermenters as essentially described in Example 1.1, with a culture medium supplemented with NaCl at a level of 27 g/L and 35.6 g/L respectively for the fermenter medium and the addition medium.
- Cultures of Schizochytrium sp. CCAP 4062/3 are carried out in fermenters as essentially described in Example 1.2, with a culture medium supplemented with NaCl at a level of 27 g/L and 35.6 g/L respectively for the fermenter base medium and the medium addition..
- the Aurantiochytrium Mangrovei CC4062/5 strain was cultured under the conditions of example 1.2. These conditions are those used in the following examples unless otherwise stated.
- the microalgal biomass was first analyzed for its proximal composition ((humidity (Internal method EAU-H adapted from EC Regulation g/100g 152/2009 of 27-01-2009 (103°C/4h) - SN), materials fat by hydrolysis (EC Regulation 152/2009 of 01-27-2009 - process B - SN), crude proteins estimated on the basis of the sum of total amino acid concentrations (Directive 98/64/EC, 09/3/99 - Standard NF EN ISO 13903), mineral materials (Regulation CE 152/2009 of 27-01-2009 - SN)), and gross energy (NF EN 14918), total fibers (AOAC 985.29 - SN), insoluble walls (according to method of Carré and Brillouet (1989, Determination of water insoluble cell walls in feeds: interlaboratory study.
- proximal composition ((humidity (Internal method EAU-H adapted from EC Regulation g/100g 152/2009 of 27-01-2009 (103
- this microalga is evaluated in vivo for the measurement of the digestibility of its amino acids in the caecectomized rooster (Green et al., 1987).
- the animals (Isabrown adult roosters) were fed by wet gavage with a mash composed of one of the ingredients tested (tested microalgae or a control soybean meal) and supplemented with wheat starch to obtain a level of 18% protein corresponding to the needs of the animals. Twelve roosters housed in individual cages were used per treatment. Each animal received an average of 171.2 ⁇ 14.5 g of mash after a 24-hour fast.
- excreta collected up to 48 hours after force-feeding were grouped together by group of 4 roosters in such a way that 3 excreta per treatment were freeze-dried. They were then left at room temperature for a water uptake phase (48 hours) in order to stabilize the moisture content, then weighed, crushed (0.5 mm) and analyzed by the Terpstra method (Terpstra and de Hart, 1974) to their non-uric nitrogen content and for their total amino acid concentrations (JEOL AMINOTAC JLC 500/V). Endogenous amino acid losses have previously been determined by evaluating a protein-deprived diet (ie without any protein intake) based on the same experimental design.
- Example 2.2 Composition of the CC4062/5 strain cultured for 49 h.
- Strain CC4062/5 was cultured as mentioned above. The culture was stopped at 49 hours, giving rise to a production of microalgal biomass of a few kilos and with the aim of organizing a preliminary test of digestibility in the animal. This biomass was dried on a cylinder dryer and is in the form of flakes. It is identified as “strain no. 4, 49h culture”.
- microalgae has a composition of total nitrogenous matter (sum of amino acids) and mineral matter that is slightly higher than that of the control soybean meal.
- the mineral content of the biomass tested is comparable to the lowest concentrations published and ranging from 7 to 43% DM depending on the families, genera and species of microalgae.
- the phosphorus and calcium contents are inversely proportioned with 2.3 times more phosphorus and 3.3 times less calcium in the microalgae compared to the control soybean meal.
- the “strain 4, 49h culture” tested does not contain starch reserves and its concentration in total sugars remains low (1.4% DM) compared to the raw materials conventionally used in animal nutrition. Conversely, its fat content is twice as high as that of soybean meal (11.2 vs. 5.6% DM) and its gross energy is 125 kcal/kg DM higher.
- microalgae The walls of microalgae have different compositions and structures from those of raw materials of plant origin, and make analyzes of fibers conventionally used unsuitable. Also, the analysis of total fibers (TDF) (Prosky et al., 1988) has the advantage of being less restrictive and the "microalgae, strain 4, culture 49h” has a total fiber percentage of 17.4% DM (which for comparison is of the order of what is analyzed in barley or rye grain) with an insoluble plant wall residue (WICW) measured at 5.2% DM.
- TDF total fibers
- WICW insoluble plant wall residue
- the total protein concentrations reported in Tables 4 to 8 are derived from the sum of the amino acids themselves assayed according to the method described above.
- the sum of the amino acids - as an estimator of the total proteins of the "microalgae, strain 4, culture 49h" - corresponds to 53.4% DM, with more precisely 21.5% DM of essential amino acids and 32.0% DM non-essential amino acids.
- Table 6 presents the concentrations of amino acids analyzed in the microalgae and soybean meal and expressed as crude or related to the sum of the amino acids.
- the concentrations of essential amino acids in the microalgae are slightly higher than those measured in soybean meal (respectively 21.5% DM and 24.0% DM).
- Example 2.3 Measurement of the digestibility of the amino acids of the biomass (strain CC4062/5 cultured for 49 h)
- the results of standardized ileal digestibility (DIS) of the amino acids measured in the caecectomized rooster are presented in table 6 as well as the concentrations of digestible amino acids.
- the digestibilities of nitrogen and of the sum of the amino acids of the microalgae are respectively 80.1 ⁇ 0.3% and 78.4 ⁇ 1.0%, i.e. 9.5 and 10.1 points less than the soybean meal control.
- the arginine and cystine SIDs of the microalga show the lowest results, respectively 61.0 ⁇ 0.8% and 60.9 ⁇ 3.7%.
- the digestibility coefficients of the essential amino acids of the microalga range from 80.7 ⁇ 1.8% (DIS threonine) to 88.7 ⁇ 0.6% (DIS histidine).
- the digestibility of lysine is measured at 85.6 ⁇ 1.3%.
- These coefficients are of the order of 1.2 (SID histidine) to 7.4 (SID tryptophan) points lower than those measured for the control soybean meal.
- SID histidine SID histidine
- 7.4 SID tryptophan
- Example 2.4 Composition of the CC4062/5 strain cultured for 22 h
- the CC4062/5 strain was cultured under the same conditions but for a period of 22 hours. It is identified as “strain no. 4, culture 22h”.
- this biomass was dried on a cylinder dryer and is in the physical form of flakes.
- microalgae, strain 4, culture 22h has a composition in total nitrogenous matter (sum of amino acids) of 2.3 and 1.3 points higher than those of the control soybean meal and the "microalgae, strain No. 4 , culture 49h”.
- the phosphorus/calcium ratio is out of balance.
- the phosphorus and calcium contents are inversely proportioned with 3.6 times more phosphorus and 3.6 times less calcium in the microalgae compared to the control soybean meal.
- Optimized strain No. 4 (22 h culture) contains 1.5 times more total phosphorus than during a 49 h culture.
- the fat content is higher than that of soybean meal (8% vs 5.6% DM), and the results confirm that neither starch nor total sugars represent a form of energy storage in this strain #4.
- Gross energy is measured at 4641 kcal/kg DM, ie 371 kcal/kg DM less vs the soybean meal control.
- the total fibers (TDF) of the “microalgae, strain 4, culture 22 h” represent 12.7% of the DM with an insoluble plant wall residue (WICW) measured at 2.1% DM.
- the residue deduced as follows: R (%) 100 - MM (%) - MAT (%) - MG (%) - starch (%) - sugars (%) indicates that the TDF content is lower by 15 .1 points to that of the R thus estimated at 27.8% DM.
- microalgae, strain 4, culture 22 h presenting 2 points more fat than the soybean meal taken in comparison (Table 7).
- Table 7 The "microalgae, strain 4, culture 22 h” presenting 2 points more fat than the soybean meal taken in comparison (Table 7).
- the sum of the amino acids amounts to 54.7% of the DM, with more precisely 23.9% DM of essential amino acids and 30.8% DM of non-essential amino acids.
- Table 8 presents the concentrations of amino acids analyzed in the microalgae and soybean meal and expressed as crude or related to the sum of the amino acids. The results reflect a relatively balanced amino acid profile of the microalgae compared to the control soybean meal. Glutamic acid, arginine and aspartic acid from the "microalgae, strain 4, culture 22h” are present in greater proportion with values (% sum AA) respectively of 26.75, 9.48 and 8, 26%. The lysine content (% AA sum) is 5.94% with reference to that of the control soybean meal (6.12%).
- Arginine, methionine and to a lesser extent threonine contribute more strongly to the microalgae protein tested than to that of soybean meal (9.48 vs 7.29%, 2.13 vs 1.36% and 4 .27 vs. 4.01% respectively).
- the microalgae cultured for 22 hours has 2.4 more points of essential acids in the case of a 49-hour culture, ie the same content as that of the control soybean meal. With the exception of arginine, the essential amino acids are present in a greater proportion of the sum of the amino acids.
- microalgae, strain 4, culture 22 h has higher methionine, arginine and threonine contents than those of soybeans, while the lysine and valine contents are equivalent or even slightly higher in the microalgal biomass.
- Example 2.5 Measurement of the digestibility of the amino acids of the biomass (strain CC4062/5 cultured for 22 h)
- the concentrations of digestible lysine, methionine, arginine, threonine and valine are higher than those of the control soybean meal. They reflect a good quality of the protein of the microalgae tested, superior or equivalent to that of a soybean meal.
- drying process used does not appear to be a factor denaturing the quality of the protein given the high digestibility coefficients measured for lysine.
- Example 2.6 determination of the Apparent Metabolizable Energy (EMA) value and of the Apparent Metabolizable Energy corrected for the nitrogen balance (EMAn) of the strain CC4062/5 cultured for 22 h.
- EMA Apparent Metabolizable Energy
- EMA Apparent Metabolizable Energy
- the EMA values were initially corrected by the nitrogen balance on the basis of 18% protein content in animal tissues and using the factor of 8.22 kcal/kg N (Hill and Anderson, 1958) .
- the value of the parameter for a 100% incorporation of the microalgae was extrapolated from the prediction model, thus making it possible to estimate the EMA and EMAn and the coefficient of apparent phosphorus digestibility of the microalgae.
- Table 10 presents the results of the digestibility of the dry matter and of the apparent metabolisable energy corrected for the nitrogen balance (AMEn) of the control corn-soya feed as well as of the substituted diets R2 to R6.
- the apparent digestibility coefficients of nitrogen (CUDa nitrogen), phosphorus (CUDa phosphorus) and calcium (CUDa calcium) and fat (CUDa MG) were estimated by the same method.
- the dry matter digestibility of different diets is strongly correlated with their ADE values.
- the ADE of the R1 corn-soya diet is measured at 3398 ⁇ 53 kcal/kg DM.
- the results show that the MEan value of the R2 diet is equivalent to that of the corn-soya control and reflect that the substitution of up to 4% by microalgae does not impact the energy digestibility of the diet.
- the EMAn as well as the CUDa nitrogen decrease in a linear fashion with the increasing percentages of substitution (P ⁇ 0.0001).
- the EMA and EMAn values of the “microalgae, strain 4, 22 h culture” are respectively measured at 2785 kcal/kg DM and 2296 kcal/kg DM. It should be noted that these values are in the range of the average in vivo reference of the measurement of the AME soybean meal of protein class 46, 48 and 50 respectively of 2303 ⁇ 137, 2348 ⁇ 248, 2365 ⁇ 178 kcal / kg MS. Thus, the contribution of this microalgae for its energy supply is similar to that of a standard quality soybean meal.
- Example 2.7 Choice tests and measurement of consumption in chicks of food comprising the biomass according to the invention
- test 1 the consumption data at each hour of measurement on the 7th and 9th day of age were analyzed according to a paired test procedure (XLSTAT 2010.4.02 ⁇ Addinsoft 1995-2010) considering that the consumption of a feeder is dependent on the consumption of the other in each cage.
- the chicks have access to only one type of food, supplemented or not with the microalgae ( figure 6 ).
- About 400 day-old male chicks (Ross PM3) were weighed and divided into weight classes. Two hundred and forty selected animals are placed in groups of 4 on day 1 in 60 unduplicated cages per block of homogeneous weight (15 blocks of 4 cages) with one feed trough per cage, each with an experimental food (15 repetitions per food). In each cage, the 4 chicks are individually identified. Food and water are distributed ad libitum throughout the trial.
- the experimental feeds are the corn-soya starter feed supplemented with 0, 5, 10 or 15% microalgae, also used in trial 1 with choice of feed.
- the consumption results show that the "microalgae, strain 4, 22h culture” tested can be included up to 15% in balanced corn-soya feed without affecting the performance of chicks from 0 to 9 days of age.
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JP6779450B2 (ja) * | 2015-10-19 | 2020-11-04 | 国立大学法人 筑波大学 | スクアレンを蓄積した培養微細藻類を含有する魚介類養殖用飼料 |
FR3085962B1 (fr) | 2018-09-14 | 2021-06-18 | Fermentalg | Procede d'extracton d'une huile riche en pufa |
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WO2020156679A1 (en) | 2019-02-01 | 2020-08-06 | Adisseo France S.A.S. | Use of a thraustochytrid biomass for maintaining gut barrier function |
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